Piper M600 To Soon Gain FAA Certification Piper Aircraft announced today that it has completed Show Compliance flight testing under FAA Type Inspection Authorization for the new M600. Together, the FAA and Piper have completed all of the necessary flight testing as prescribed in 14 CFR Part 23 for the M600 project. The completion of this major milestone for the aircraft certification program has cleared the path for the start of Function and Reliability testing which began Monday, May 23rd. Function and Reliability testing is the final stage of the FAA flight test certification program following which Piper Aircraft will receive FAA Type Certification for the M600. In other words, the M600 only has one more hurdle to complete before being granted U.S FAA certification.